Hi,

thanks for the response. I commented out the welding code from both shapes and it fixed it! The box still does drop off though, but it does it quite naturally and because of the -2 Z-position of the box :)

If I set the Z to zero, it settles on the other box nicely after some sliding.

I actually copy pasted the welding code from this forum, hoping it would the missing piece to my original problem, which was when the boxes came to contact, the whole application crashed. But upgrading to Havok 6 fixed that, leaving only the bizzarre behaviour problem, which is now fixed, thanks.

The vehicle test acts still all weird after commenting the welding code, but I'll have to do further testing tomorrow and try that hkpExtendedMeshShape you suggested. I'll get back to you with the results.

Thanks a lot for the help.

Best Regards,

vfgdfg